Self-sealing filter



Feb. 28, 1933. c. H. GAGEN 1,899,029

SELF SEALING FILTER Original Filed June 20, 1928 Fig. 2

72 III Charles 11.. Ha en INVENTOI? BYMwuaiW ATTORNE Y Patented Feb. 28,1933 UNITED STATES PATENT OFFIQE CHARLES H. GAGEN, OF MONTCLAIB, NEWJERSEY, ASSIGNOR TO AMERICAN AIR FILTER COMPANY, INC., F LOUISVILLE,KENTUCKY, A. CORPORATION OF DELAWARE SELF-SEALING FILTER Originalapplication filed June 20, 1928,

This invention relates to self-sealing filter construction and is adivision of my co-pending application, Serial #286,7 71, filed June 20,1928 now Patent #1,821,211, issued Sep- 5 tember 1, 1931. Thisco-pending application discloses a filter constructionin which filtercells or units are mounted or adapted to be mounted on a suitable frame.The cells therein shown are of a special or double passage type beingformed with passages that open at the front and rear of the cell unitfor the passage of the air stream and at the top and bottom for thepassage of a filter cleaning medium. Such application is directed tomeans for sealing the top and bottom cleaning openings when the filteris in its operative or air filtering position. It is also directed tomeans for preventing the passage or leakage of air between the cell unitand the frame upon which it is mounted. It is to this latter featurethat the present invention is specifically directed. The principalobject of the invention is to provide a cell which may be positioned ona frame simply by hooking the cell thereto, and which when positionedwill by virtue of its weight tend to maintain such close engagement withthe frame as to prevent the passage or leakage of air between the unitand the frame. W

An embodiment of the invention is illustrated in the accompanyingdrawing, wherein:

Figure 1 is a fragmentary front elevation of a suitable supportingframe, showing in dotted lines the area of the frame covered by a cellunit;

Figure 2 is a sectional view taken along line 22 of Figure 1, showing afilter cell in top plan view; and

Figure 3 is a sectional view taken along line 33 of Figure 1, with afilter cell in operative position.

In carrying out the invention a frame for the support of one or morecells. is provided which is composed of vertical and horizontal SerialNo. 288,?71. Divided and this application filed October 18, 1939. SerialHo. 489,576.. 2

members 70 and 71 arranged to form rectangular openings 72 therein. Afilter cell or unit indicated generally at 73 is adapted to be placed infront of each such recess 7 2 and the air drawn through the same in thedirection of the arrow 74. The cell 73 overlaps the respective framemembers all around the edges of the opening 7 2 to a desired distance asindicated by the dotted lines 75 in Figure 1. Each cell has adjacent tothe upper ends of its two vertical side wall members two hooks orsuspending devices 76 suitably secured thereto. The hooks 7 6 areadapted to be hung into and thru appropriate recesses 77 cut in theflanges of the vertical T frame members 70. The inner or under edge 78of the projecting portion 79 of the hook device 76 is formed with aninclined surface so that when the cell is suspended in its properposition't he plane of engagement between the hook and frame inclinesdownwardly away from the unit. As a result of this mode of engagementthe weight of the cell 73 will tend to draw the cell tightly against therespective overlapped surfaces of the vertical and horizontal T framemembers 70 and 71 and thereby seal the edges of the opening 72. With theedges sealed it is obvious that the air will be prevented from passingaround the side, top and bottom walls of the cell and between the frameand cell unit as a whole and will thereby be compelled to pass into thefiltering passages before escaping to the clean air side of the filtercells.

Having described my invention, I claim In a filter the combination of aframe presenting a unit receiving opening, the frame being formed withrecesses at the sides of each opening, a unit adapted to be positionedwith its edges on one side overlapped by vertical frame surfacesadjacent said opening, and inter-engaging means between said unit andthe frame whereby when the unit is operatively positioned its weightconstantly tends to maintain in close engagement the overhpping surfacesbetween aid unit and frnmeeoeetopreventthepemegeofnir therebetw andmenus comprismg hooks eecuredto esidewlllsoftheunitlndr en glge th m3?1'1fi e e an ere y support e umt thereon, the planes of w tween thehooks endfreme in werdly away from the unit. In testimony whereof, Ihereunto nfix my signature this first de of October, 1930.

v CHA LES H. GAGEN.

